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-rw-r--r--kernel/cgroup.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 061569f..e9aa2a5 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1056,6 +1056,11 @@ static void cgroup_put(struct cgroup *cgrp)
if (WARN_ON_ONCE(cgrp->parent && !cgroup_is_dead(cgrp)))
return;
+ /* delete this cgroup from parent->children */
+ mutex_lock(&cgroup_mutex);
+ list_del_rcu(&cgrp->sibling);
+ mutex_unlock(&cgroup_mutex);
+
cgroup_idr_remove(&cgrp->root->cgroup_idr, cgrp->id);
cgrp->id = -1;
@@ -4561,9 +4566,6 @@ static void cgroup_destroy_css_killed(struct cgroup *cgrp)
{
lockdep_assert_held(&cgroup_mutex);
- /* delete this cgroup from parent->children */
- list_del_rcu(&cgrp->sibling);
-
cgroup_put(cgrp);
}
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